1
vote
0answers
14 views
How do the different stroke lengths affect the mirror shape while polishing?
I am making an 8.5" mirror. Presently in the final polishing stages.
There is a lot of advice on the Internet about correcting various shape defects. But I couldn't find a compreh …
2
votes
3answers
37 views
Building my first telescope. Mirror size recommendations?
Howdy,
I'm a soon-to-be amateur telescope maker, and I'd like some advice on mirror sizing.
I'm planning a pretty standard Newtonian reflector on a Dobsonian mount. Truss tubes, …
0
votes
0answers
7 views
What should I look for when buying a telescope made by an individual?
Someone has offered to sell me a telescope he made a few years ago. It's a Dobsonian mount, truss-tube reflector. The mirror was purchased from a commercial vendor. It looks like a …
